SCH Number 2024020659

Project Info

Title

Las Trampas Creek Bridge at South Main Street Replacement Project

Description

The existing five-span bridge would be replaced with a new two-span precast-prestressed voided concrete slab bridge. The bridge would be replaced in two phases, Phase 1 would construct the Pedestrian/Utility Bridge and Phase 2 would construct the Replacement Bridge which would require closing South Main Street. The proposed pedestrian/utility bridge would be approximately 105-ft long and provide a 10-foot-wide pedestrian path. The proposed vehicular bridge (Replacement Bridge) would be 104 feet long and approximately 92 feet wide including barriers, one 10-foot sidewalk in compliance with the Walnut Creek Pedestrian Master Plan design guidelines for the Core Area Zone, and one 4-foot-wide median. The bridge would convey vehicular traffic on four 12-foot through lanes and a left-turn lane that would vary in width. The proposed vertical profile is planned to be similar to the existing profile to minimize cut/fill requirements adjacent to the proposed bridge. The proposed roadway approaches are planned to be slightly realigned from their existing condition between the intersections at Botelho Drive and Broadway Plaza to conform to the new bridge width. Improvements to the north and south roadway approaches are anticipated to be less than 200 feet long on either side of the proposed bridge.

2 documents in project